Even though we love a good fashion faceoff, there's no winner or loser here. Both Lopez and Jenner looked completely amazing in the chocolate brown sheer-paneled onesie, and each of them wore the piece in a unique way. The model's runway-ready version included a wide suede belt, oversize metal choker collar, and matching lace-up booties, while the singer's perfect party outfit was accessorized with sleek suede pumps and dazzling diamond Jason of Beverly Hills jewelry.

But that wasn't the only jumpsuit Lopez wore in honor of her big day. She attended a second birthday bash in Sin City wearing a plunging sequined Zuhair Murad look that showed off all of her best assets.